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#243 Add the digamma function

v1.1.x
closed
Erik Hänel
None
v1.1.1
New Functionality
2018-05-15
2017-09-19
Erik Hänel
No

Add the digamma function and its derivatives, e.g. as digamma() and polygamma(). See https://www.gnu.org/software/gsl/manual/html_node/Psi-_0028Digamma_0029-Function.html#Psi-_0028Digamma_0029-Function

Analysis:
Straigthforward implementation using the functions from GSL and the usual mu::Parser function signatures. Needs also the usual documentation steps in the language files, the search database and the syntax elements list.

Implementation:
The function was implemented as proposed by the analysis. Implementation tests were passed successfully. Done with [#239].

Documentation:
The function was added to the syntax element list, the language file and to the search database in both languages. It was noted in the Changes log.

Tests:
The function was compared with a reference implementation. No deviation detected. Functionality implemented successfully.

Related

Tickets: #239

Discussion

  • Erik Hänel

    Erik Hänel - 2017-09-30
    • status: open --> accepted
     

  • Erik Hänel

    Erik Hänel - 2017-12-11
    • Version: v1.1.0 --> Planned
     

  • Erik Hänel

    Erik Hänel - 2018-01-05
    • Version: Planned --> v1.1.1
     

  • Erik Hänel

    Erik Hänel - 2018-05-04
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -1 +1,9 @@
 Add the digamma function and its derivatives, e.g. as `digamma()` and `polygamma()`. See https://www.gnu.org/software/gsl/manual/html_node/Psi-_0028Digamma_0029-Function.html#Psi-_0028Digamma_0029-Function
+
+**Analysis:**
+
+**Implementation:**
+
+**Documentation:**
+
+**Tests:**
    • status: accepted --> analyzing
     

  • Erik Hänel

    Erik Hänel - 2018-05-05
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -1,6 +1,7 @@
 Add the digamma function and its derivatives, e.g. as `digamma()` and `polygamma()`. See https://www.gnu.org/software/gsl/manual/html_node/Psi-_0028Digamma_0029-Function.html#Psi-_0028Digamma_0029-Function

 **Analysis:**
+Straigthforward implementation using the functions from GSL and the usual `mu::Parser` function signatures. Needs also the usual documentation steps in the language files, the search database and the syntax elements list.

 **Implementation:**
    • status: analyzing --> implementing
     

  • Erik Hänel

    Erik Hänel - 2018-05-05
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -4,7 +4,9 @@
 Straigthforward implementation using the functions from GSL and the usual `mu::Parser` function signatures. Needs also the usual documentation steps in the language files, the search database and the syntax elements list.

 **Implementation:**
+The function was implemented as proposed by the analysis. Implementation tests were passed successfully. Done with [#239].

 **Documentation:**
+The function was added to the syntax element list, the language file and to the search database in both languages. It was noted in the Changes log.

 **Tests:**
    • status: implementing --> testing
     

    Related

    Tickets: #239

  • Erik Hänel

    Erik Hänel - 2018-05-15
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -10,3 +10,4 @@
 The function was added to the syntax element list, the language file and to the search database in both languages. It was noted in the Changes log.

 **Tests:**
+The function was compared with a reference implementation. No deviation detected. Functionality implemented successfully.
    • status: testing --> closed
     

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